Eagle-eyed technical experts prove there is no such thing as a perfect crime as they assemble the pieces every criminal leaves behind. Dramatic crime re-creations and, sometimes, part of the investigations are a staple of the series. Some of the re-creations include alternate versions of the crimes, which are disproved by science. The show's episodes follow each case from the initial investigation until it reaches its legal resolution.

Wondering how the events really happened, HLN's original series revisits and reveals new answers to notorious crimes, mysteries, trials, and celebrity tragedies. The premiere delves into the sensational trial of brothers Lyle and Erik Menendez, including the shocking motive for the brutal murders of their wealthy parents. From there, episodes dissect new clues and re-examine conspiracy theories connected to, among others, the John F. Kennedy Jr. plane crash, the deaths of music royalty Prince, Michael Jackson and Whitney Houston, and the FBI's investigation of "Unabomber" Ted Kaczynski. Included are fresh accounts from witnesses who speak publicly about the cases for the first time. Actor Hill Harper, best known for his role on "CSI: NY," hosts.

Victims' rights activist John Walsh returns to weekly TV as host of a documentary-style investigation series. Walsh details stories of ongoing cases involving fugitives, with the intent of expanding searches outside the United States. Interviews with victims, loved ones and law enforcement accompany new leads in each hourlong episode, giving the public information to facilitate the capture of suspects. Walsh, a spokesman for the National Center for Missing & Exploited Children, hosted the series "America's Most Wanted" for 25 years, helping apprehend more than 1,200 criminals.

BD Wong is not a doctor, although he played one on TV -- forensic psychiatrist/criminal profiler Dr. George Huang on "Law and Order: SVU." So he's familiar with complicated cases and digging deep for proper diagnoses, both of which play into his role as host of "Something's Killing Me." The HLN original production is a six-part documentary series that examines puzzling diseases and symptoms that result in near-death struggles. Featuring re-enactments, each hourlong episode tells actual stories of how doctors, scientists and, in some cases, federal investigators race against time to discover what or who is killing a patient. Included are interviews with victims, their families and doctors.

Chris Cuomo explores the psyche of criminal offenders and the impact of nature vs. nurture on their violent behavior.

CNN is by and large still a cable news outlet, but a movement under the leadership of network president Jeff Zucker to provide more alternative, entertainment-based programming is clearly afoot, and "Death Row Stories" is a prime example. The eight-part documentary -- the result of a collaboration with Academy Award-winning directors Robert Redford ("Ordinary People") and Alex Gibney ("Taxi to the Dark Side") -- revisits compelling capital murder cases in the U.S., detailing the twists and turns involved in each as a thought-provoking exercise on the death penalty and the American justice system. "Dead Man Walking" Oscar winner Susan Sarandon is the narrator. Redford's Sundance Productions also partnered with CNN for the documentary series "Chicagoland."

From the team behind CNN's highly rated original series "Finding Jesus" comes "Beyond Reasonable Doubt," an unscripted offering designed to broaden HLN's true crime audience. The hourlong series takes viewers deep inside the world of crime fighting through high-profile criminal cases that were ultimately solved by advances in forensic science or technology. Driven by first-person storytelling, episodes feature the lead detectives of each case and a supporting cast of forensic scientists who highlight how technology is changing the face of criminal investigations.

Shining a light on the shocking and sometimes heartbreaking stories affecting real people in real towns and cities across America.